A control chart to evaluate the control effect of a bridge under active control

W. Sung, M. Shih
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Abstract

To reinforce and improve the function of disaster relief light bridge, the developed Neutral Equilibrium Mechanism (NEM) was applied for controlling the internal force and reducing the vertical deformation of a bridge to form as virtual piers. The control force of NEM was generated by the Proportional–Integral–Derivative controller with a combination of the displacement GP, speed GD and adjusted GI gain coefficients to neutralize the vertical deformation of a bridge created by a moving live load and the dead weight of a bridge. To effectively evaluate the control efficiency of bridge deformation under this mechanism, a multi-dimensional quality evaluation method is proposed to assess the control benefits of bridge deformation under different combinations of control coefficients. The test and analysis results in control performance analysis chart show that it can be clearly observed the control performance index MTIi is around 2-3, 3 and 5 for the combination of GP = 0.5, GD = 0.0, GI = 0.02, GP = 1.0, GD = 0.0, GI = 0.02, and GP = 2.0, GD = 0.0, GI = 0.02 respectively. The analysis results present a clear demonstration of control performance, which can serve as a reference for future practical control safety.
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评价桥梁在主动控制下控制效果的控制图
为了加强和提高救灾轻型桥梁的功能,应用已开发的中性平衡机制(NEM)来控制桥梁的内力和减小垂直变形,形成虚拟桥墩。NEM的控制力由比例-积分-导数控制器结合位移GP、速度GD和调整GI增益系数产生,以抵消移动活荷载和桥梁自重造成的桥梁垂直变形。为有效评价该机制下桥梁变形控制效果,提出了一种多维质量评价方法,对不同控制系数组合下的桥梁变形控制效果进行评价。对照性能分析图的测试分析结果表明,可以清楚地看到,GP = 0.5, GD = 0.0, GI = 0.02, GP = 1.0, GD = 0.0, GI = 0.02, GP = 2.0, GD = 0.0, GI = 0.02组合时,对照性能指标MTIi分别在2- 3,3,5左右。分析结果清晰地展示了控制性能,可为今后的实际控制安全提供参考。
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来源期刊
CiteScore
3.00
自引率
10.00%
发文量
48
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